【摘要】 利用考虑时空效应的被动区土体等效弹性基床系数代替实测土体基床系数,并用土弹簧简化土体对支护结构的侧向压力,对基坑开挖进行全过程三维模拟。这种考虑软土自身抵抗变形能力的时空效应计算方法有着省时并易于收敛的优点,结果也与实测数据较为吻合。同时,分析了超挖对基坑施工的影响。更多还原

【Abstract】 A new deep excavation FEM simulating method is analyzed.It can save calculating time and get an easy convergent result by using equivalent horizontal stiffness factor of subsoil based on the time-space theory.Horizontal pressure on diaphragm can be simplified as the force of soil springs,and the value is equal to equivalent horizontal stiffness factor.The deformation resistant ability of soft clays in this method is considered,and the results basically the match monitored data.Over break is also analyzed in this research.更多还原